Space Review

Space and all the matter and energy in it.

• Space
• Solar System 
• Universe
• Sun

The sun and all of the planets and other bodies that travel around it. 

• Universe 
• Galaxy 
• Star
• Solar System 

A relatively large spherical body that orbits a star.

• Star 
• Planet
• Moon 

A large celestial body that is composed of gas and that emits light.

• star
• black hole
• element 
• big bang

A collection of stars, dust, and gas bound together by gravity.

• Nebula
• Galaxy 
• Universe
• Protostar

 A large cloud of gas and dust in interstellar space; a region in Space where stars are born.

• Protostar 
• Nebula
• Galaxy 
• Star

A collection of stars, dust, and gas bound together by gravity.

• Nebula
• Galaxy 
• Universe
• Protostar

The distance that light travels in one year; about 9.46 trillion kilometers.

• Light Year
• Light Kilometer 
• Light Second 
• Warp Speed

The most commonly accepted theory that explains the beginning of our known universe is the -

• Theory of Evolution
• Big Bang Theory
• Cell Theory
• Blackhole theory

Which of the following is the largest?

• star
• universe
• cluster
• galaxy